/**
 * Copyright 2009-2019 the original author or authors.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.ibatis.scripting.defaults;

import org.apache.ibatis.builder.BuilderException;
import org.apache.ibatis.mapping.SqlSource;
import org.apache.ibatis.parsing.XNode;
import org.apache.ibatis.scripting.xmltags.XMLLanguageDriver;
import org.apache.ibatis.session.Configuration;

/**
 * 静态SQL，不支持动态SQL
 * As of 3.2.4 the default XML language is able to identify static statements
 * and create a {@link RawSqlSource}. So there is no need to use RAW unless you
 * want to make sure that there is not any dynamic tag for any reason.
 *
 * @author Eduardo Macarron
 * @since 3.2.0
 */
public class RawLanguageDriver extends XMLLanguageDriver {

    @Override
    public SqlSource createSqlSource(Configuration configuration, XNode script, Class<?> parameterType) {
        SqlSource source = super.createSqlSource(configuration, script, parameterType);
        checkIsNotDynamic(source);
        return source;
    }

    @Override
    public SqlSource createSqlSource(Configuration configuration, String script, Class<?> parameterType) {
        SqlSource source = super.createSqlSource(configuration, script, parameterType);
        checkIsNotDynamic(source);
        return source;
    }

    private void checkIsNotDynamic(SqlSource source) {
        if (!RawSqlSource.class.equals(source.getClass())) {
            throw new BuilderException("Dynamic content is not allowed when using RAW language");
        }
    }

}
